VF(C4O4)(H2O)2: a new layer type of diaqua­vanadium(III) fluoride squarate

Single crystals of the title compound, polydiaqua‐μ‐fluoro‐μ‐squarato‐vanadium(III)], V(C₄O₄)F(H₂O)₂]_n, have been prepared hydro­thermally at 423 K. This compound is shown to have a layer‐type structure. The V and F atoms are localized on the symmetry centers 2a and 2d, respectively, of the monoclinic system (space group P2₁/n) and they form infinite chains which are bridged by the squarate group acting as a bidentate ligand in a trans position. Two water mol­ecules complete the octa­hedral coordination of vanadium(III). The three‐dimensionality is ensured by a strong O—H⋯O hydrogen bond.